Oral cavity testing device



FIG. 1 is a perspective view of an oral cavity testing device according to our new design.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a left side elevational view thereof.

FIG. 5 is a right side elevational view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate the portions of the oral cavity testing device that form no part of the claim. 

CLAIM The ornamental design for an oral cavity testing device, as shown and described. 